Square bottom taco shell



FIG. 1 is a perspective view of a square bottom taco shell of the present design;

FIG. 2 is a left side view of the square bottom taco shell of FIG. 1, the right side view being identical thereto; and,

FIG. 3 is a front view of the square bottom taco shell of FIG. 1, the rear view being identical thereto. 

The ornamental design for a square bottom taco shell, as shown and described. 